(57) Disclosed is a table driving apparatus adapted for use with an automatic mounting
apparatus or assembling robot comprising a working table ( 1 ) movable in at least
one direction, and a direct-drive motor ( 13, 15, 30 ) having a rotary arm ( 11, 16
). A mechanism ( 5, 6, 10, 17 ) is provided for mechanically coupling the working
table ( 1 ) and the rotary arm in such a manner that turning movement of the arm can
be converted into linearly sliding movement of the working table along the one direction.
The direct-drive motor ( 13, 15, 30 ) is coupled with the working table with such
a small compliance that the resonance frequency of a system including the direct-drive
motor and a load coupled therewith lies out of a frequency range within which the
direct-drive motor is operable. This arrangement assures a rigid coupling between
the direct-drive motor and the working table with a small compliance, so that the
resonance frequency becomes much higher than otherwise coupled, thus enabling a stable
and precise driving of the working table.
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